بسم الله الرحمن الرحيم
“Guests of Ibrahim?”
That would be the angels.
This story is mentioned in Surah Adh-Dhaariyat (and in other places).
A brother, may Allah reward Him greatly, has translated Imam As-Saadi’s (rahimahullah) tafsir of this story.
[Note: Yes, I do realise that I post a lot of Imam As-Saadi’s stuff up! It’s not intentional.
It just so happens that a lot of people happen to use his tafsir because of its conciseness and the author’s sound aqeedah (creed).]